Riddle me this
Am I a function?
What's my function?
Graph What?
Evaluating Functions
100
What month of the year has 28 days?
All of them
100
In a function, how many outputs can one input have?
Each input has one and only one output.
100
Evaluate y = 2x +1 when x = -3
y = -5
100
Based on the graph of function, What is y when x=2?
y = 3
100
f(x)= 2x+1, find f(3)
f(3)=7
200
What is cut on a table, but is never eaten?
A deck of cards
200
Yes
200
Evaluate y= x2 + x + 1 when x = -5
y = 21
200
Based on the graph of function, what is y when x=0?
y = 4
200
h(x)= 37-x, find h(2)
h(2)=35
300
What has a head and a tail but no body?
A Coin
300
Is this a function and why?
No because x=8 has two outputs (3 and -3)
300
Evaluate y = x2 - 2 when x = -2
y = 2
300
Based on the graph of the function, what is y when x=4?
y = -2
300
z(x) = x2+7x+2, find z(1)
z(1)=10
400
If there are three apples and you take away two, how many apples do you have?
You have two apples
400
Does the following table represent a function?
x y
1 2
2 5
6 2
2 9
5 1
No, because the input (x) of 2 has two different outputs (y)
400
Evaluate y = 4x2 - 1 when x= -2
y = 15
400
f(x) = 6x - 10
f(-3)
400
z(x) = x2+7x+2, find z(4)
z(4)=46
500
Two in a corner, one in a room, zero in a house, but one in a shelter. What is it?
The letter “r”
500
No, vertical lines are not functions.
500
If y = 8 what is x if y = 2x + 4
x = 2
500
Given f(x) = -x + 9, if f(x) = 10
x = -1
500
z(x) = x2+7x+2, find z(2)
z(2)=20